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Engine timing chain tensioner O-ring, 12 x 1.78mm. Porsche 911 84-89 / 964 Turbo 3.0L - 99970169040
99970169040/1
Vehicle Group
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 911 1978-1989 3.3L Turbo (930)
- Porsche 964 (911) TURBO 3.3L 1991-93
Information
Engine timing chain tensioner O-ring
This O-Ring is an OE-style sealing ring designed for the engine timing chain tensioner assembly on Porsche 911 and 964 Turbo models. It provides a leak-proof seal between the hydraulic chain tensioner and engine housing. The O-ring measures approximately 12 x 1.78 mm.
Sold individually, 2 required per engine
Fits:
Porsche 911 1984 - 1989
Porsche 964 Turbo 3.3L 1990 - 1992 (Engine code: 3069)
Diagram ref no 11
Installed between the hydraulic chain tensioner and engine housing, the O-ring prevents engine oil leakage while maintaining proper hydraulic pressure within the timing chain tensioner system. Correct sealing is essential for reliable chain tension control and accurate engine valve timing. A compromised seal may result in oil leaks, pressure loss, or reduced tensioner performance.
This O-ring is ideal for preventative maintenance, engine rebuilds, timing chain service work, or replacement during tensioner overhaul procedures.
The O-ring seals the hydraulic timing chain tensioner assembly, preventing oil leakage and helping maintain proper hydraulic pressure within the timing system. This supports reliable timing chain operation and accurate engine valve timing.
Function
• Seals hydraulic timing chain tensioner assembly
• Prevents engine oil leakage around tensioner housing
• Maintains hydraulic pressure within timing system
• Supports accurate timing chain tension operation
• Resists heat, oil exposure, and pressure cycling
Over time, engine O-rings can harden, flatten, or crack due to heat exposure, oil contamination, and age. A failing tensioner seal may cause oil leaks and reduced hydraulic pressure, potentially affecting timing chain tension stability. Replacing worn O-rings during service helps maintain reliable engine lubrication and timing system operation.
When to replace
• Oil leakage around timing chain tensioner
• During timing chain or tensioner servicing
• Hardened, flattened, or damaged O-ring seal
• During engine rebuild or overhaul
• Preventative maintenance on high-mileage engines
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970169040
The product you are viewing cross references to these numbers
This O-Ring is an OE-style sealing ring designed for the engine timing chain tensioner assembly on Porsche 911 and 964 Turbo models. It provides a leak-proof seal between the hydraulic chain tensioner and engine housing. The O-ring measures approximately 12 x 1.78 mm.
Sold individually, 2 required per engine
Fits:
Porsche 911 1984 - 1989
Porsche 964 Turbo 3.3L 1990 - 1992 (Engine code: 3069)
Diagram ref no 11
Installed between the hydraulic chain tensioner and engine housing, the O-ring prevents engine oil leakage while maintaining proper hydraulic pressure within the timing chain tensioner system. Correct sealing is essential for reliable chain tension control and accurate engine valve timing. A compromised seal may result in oil leaks, pressure loss, or reduced tensioner performance.
This O-ring is ideal for preventative maintenance, engine rebuilds, timing chain service work, or replacement during tensioner overhaul procedures.
The O-ring seals the hydraulic timing chain tensioner assembly, preventing oil leakage and helping maintain proper hydraulic pressure within the timing system. This supports reliable timing chain operation and accurate engine valve timing.
Function
• Seals hydraulic timing chain tensioner assembly
• Prevents engine oil leakage around tensioner housing
• Maintains hydraulic pressure within timing system
• Supports accurate timing chain tension operation
• Resists heat, oil exposure, and pressure cycling
Over time, engine O-rings can harden, flatten, or crack due to heat exposure, oil contamination, and age. A failing tensioner seal may cause oil leaks and reduced hydraulic pressure, potentially affecting timing chain tension stability. Replacing worn O-rings during service helps maintain reliable engine lubrication and timing system operation.
When to replace
• Oil leakage around timing chain tensioner
• During timing chain or tensioner servicing
• Hardened, flattened, or damaged O-ring seal
• During engine rebuild or overhaul
• Preventative maintenance on high-mileage engines
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970169040
99970169040
The product you are viewing cross references to these numbers
Price: €3.04
In stock
Related products
Vehicle Group
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Information
Chain tensioner housing with guide rail, 1-4 cyl.
only housing with guide rail
Fits:
Porsche 928 1985 - 1995
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810502809
The product you are viewing cross references to these numbers
only housing with guide rail
Fits:
Porsche 928 1985 - 1995
Diagram ref no 17
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
92810502809
92810502809
92810502808
92810502806
92810502804
92810502709
92810502708
92810502706
92810502704
The product you are viewing cross references to these numbers
Price: €108.90
Orderable
Vehicle Group
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 2.7L 8V 1988-89
- Porsche 944S 2.5L 16V 1987-88
- Porsche 944S2 3.0L 16V 1989-91
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
- Porsche 928 4.5L 1978-82
- Porsche 928S 4.7L 1981-83
- Porsche 928S2 4.7L 1984-86
- Porsche 928S4 5.0L 1987-92
- Porsche 928GT 5.0L 1989-91
- Porsche 928GTS 5.4L 1992-95
Information
The timing adjuster is an expensive part to change so here is a Timing Chain Adjuster Guide Repair Kit
One kit fits one adjuster
Fits:
Porsche 944 S 2.5L 1987>>
Porsche 944 S2 3.0L 1989-91
Porsche 928 1983
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410594900
The product you are viewing cross references to these numbers
One kit fits one adjuster
Fits:
Porsche 944 S 2.5L 1987>>
Porsche 944 S2 3.0L 1989-91
Porsche 928 1983
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
94410594900
94410550105
92810550901
92810534701
94410594900
The product you are viewing cross references to these numbers
Price: €81.90
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